/*-+-*****************************************************************************
 Copyright (C) 2009-2012 Oceanside Software Corporation (R)
 Dallas, Texas

 Author       : Jason T. Brower
 Purpose      : This file is part of a point-of-sale software package
                originally written for Table-Service Restaurants.
              
 Date         : July 8th of 2012
              
 History      : The application that this software file belongs to was 
                written over a 3-Year period.  The first version was written
                in C# .Net 3.5 using Windows Forms.  Being new to .Net at
                the time, I soon learned of Windows Presentation Foundation,
                liked the graphics capabilities and databinding so I
                migrated to WPF.  When the .Net 4.0 framework was released
                the application was migrated from 3.5 to 4.0. Now today,
                .Net 4.5 RC is out and I was already in process of migrating
                before I made this public.
                
Excuse Me     : Please excuse the coding style, it is not representative of
                my typical work.  During the three years I was under a very
                tight budget, constantly running out of funding and was 
                working 18 hour days hyped up on 5-Hour Energy.  The 
                design is not textbook.  It is monolythic because of
                previous issues I will not get into.  There are few comments
                in the code and the ones that are there may be incorrect.
                
What it is not: This is not the exact version that I took through PA-DSS 2.0
                nor is it the exact version running at my customer sites.
                I removed some details for security purposes including some
                encryption algorithms.  The reporting was removed because
                I was including a third party library that cannot be 
                published with this Open Source.
                
What it is    : This application has been running at high volume restaraunts
                for over a year.  It never freezes, crashes or does anything
                unexpected.  So long as it is built, installed and configured
                correctly, it is a strong system that we can all enhance.

Contact       : Please note that I can no longer work for free.  However, you
                can reach me at information@oceansidesw.com.                                                      

*********************************************************************************/
using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Input;
#if _LOCALDB
  using Oceanside.LocalDB;
#else
using Oceanside.RemoteDB;
#endif
namespace Oceanside
{
    /// <summary>
    /// Interaction logic for PageLogin.xaml
    /// </summary>
    public partial class PageLoginImp : PageImpBaseClass
    {
        private Boolean isPopupMode = false;

        /// <summary>
        /// Called when the user presses the login button.
        /// </summary>
        private PageLogin.BohLoginDelegate UserLoginDelFunc = null;
        Button buttonLogin;
        TextBox textBoxUsername;
        PasswordBox passwordBoxPassword;

        /// <summary>
        /// Constructor
        /// </summary>
        public PageLoginImp(
            PageLogin.BohLoginDelegate loginDel, 
            Button buttonLogin, 
            TextBox textBoxUsername, 
            PasswordBox passwordBoxPassword)
        {
            this.UserLoginDelFunc = loginDel;
            this.buttonLogin = buttonLogin;
            this.textBoxUsername = textBoxUsername;
            this.passwordBoxPassword = passwordBoxPassword;

            buttonLogin.Click += new RoutedEventHandler(buttonLogin_Click_NOTHROW);
            UserLoginDelFunc += loginDel;


            mEntityAddDeleteLoggingEnabled = true;
        }


        /// <summary>
        /// If the user presses the login button then perform a login.
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        void buttonLogin_Click_NOTHROW(object sender, RoutedEventArgs e)
        {
            try
            {
                PerformLogin();
            }
            catch (System.Exception exc)
            {
                Constants.ErrorDispatcher.Notify(Error.EType.E_PAGELOGIN_LOGIN_ATTEMPT, exc);
            }
        }

        /// <summary>
        /// If the user presses the enter key, then peform a login.
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void LayoutRoot_KeyUp(object sender, KeyEventArgs e)
        {
            if (!isPopupMode)
            {
                if (e.Key == Key.Enter)
                {
                    PerformLogin();
                }
            }
            else
            {
                isPopupMode = false;
            }
        }

        /// <summary>
        /// The command function that actually performs the login.
        /// </summary>
        public void PerformLogin()
        {
            if (DominicaEntities.BohRequiresReset(textBoxUsername.Text))
            {
                UserLoginDelFunc(PageLogin.LoginState.PasswordReset, textBoxUsername.Text);
                textBoxUsername.Text = "";
                passwordBoxPassword.Password = "";
            }
            else if (DominicaEntities.BohAccountIsLocked(textBoxUsername.Text))
            {
                passwordBoxPassword.Password = "";
                textBoxUsername.Text = "";
                UserLoginDelFunc(PageLogin.LoginState.Locked, textBoxUsername.Text);
            }
            else
            {
                USER user = DominicaEntities.ValidateBohLogin(textBoxUsername.Text, passwordBoxPassword.Password, Context);
                if (user != null)
                {
                    user.BohPasswordAttempts = 0;
                    Context.SaveChanges();
                    UserLoginDelFunc(PageLogin.LoginState.LoggedIn, textBoxUsername.Text);
                    passwordBoxPassword.Password = "";
                    textBoxUsername.Text = "";
                }
                else
                {
                    isPopupMode = true;
                    System.Windows.MessageBox.Show("That was an invalid username and password combination.  Please try again.", "Invalid Login", MessageBoxButton.OK);
                    UserLoginDelFunc(PageLogin.LoginState.NotLoggedIn, textBoxUsername.Text);
                    passwordBoxPassword.Password = "";
                }
            }
        }
    }
}
